A soft-spoken, well-groomed second-year student with long, light green hair, Emiri first appears in "Mysterique Sign" seeking counsel from the SOS Brigade claiming she is the girlfriend of the Computer Research Society president,

Kyon later discovers that this is not the case, which leads him to suspect that Emiri is a Humanoid Interface like Yuki and Ryoko.

Emiri later reappears as the secretary to the president of the Student Council. By this time, it is implied that she is Yuki's superior, or at the very least her minder, as a consequence of Yuki's world-altering actions. Emiri is also later shown to work part-time (and against the rules of the School Council) as a waitress in the cafe frequented by the SOS Brigade.

In The Astonishment of Haruhi Suzumiya, Emiri reveals that Nagato transferred part of her judgment skills to Emiri to use while Nagato was sick. Asakura warns Kyon that Emiri will be harder to get help from than herself because Emiri will be too confined by the commands of her superiors - only "watching."